Synthesis of MIL-88A for decolorization and COD removal in sugar industrial wastewater

Abstract

This research aimed to synthesize MIL-88A for color and COD removal in sugar factory wastewater by adsorption process. The sorbent (MIL-88A) was produced by mixing of fumaric acid and FeCl₃·6H₂O. The structure and morphology of MIL-88A were studied with Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The asprepared MIL-88A was then study for the treatment efficiency of sugar industry wastewater in Phetchabun Province. The results showed that structural and morphological characteristics of MIL-88A performed by FESEM was hexagonal rod-like morphology with uniform size distribution and the length was 100 nm while the peaks from XRD were found at 10.8° and 12°. The as-prepared MIL-88A pattern met with standard MIL-88A pattern. The maximum treatment efficiencies of color and COD by as-prepared MIL-88A were 74.9% and 85.0%, respectively. The equilibrium times of color and COD adsorption were 30 and 60 minutes, respectively. The adsorption kinetics of decolorization and COD were consistent with the pseudo-second order model. The correlation coefficient of color removal was 0.9976 and the COD removal was 0.9270. When considering the effluent standards from industrial plants, it was found that the color and COD values could not be reduced to comply the standard.